Multiple piston or bucket pump.



B. U. POTTER.

MULTIPLE PISTON 0R BUCKETYPUMP.

APPLICATION FIL'ED 050.21. 1916.

Patented Dec. 111, 1917.

waw

ilbiatt wt omitmag concern:

'IITI) snares rgrnnr OFFIO uunn'ann n. rorrnn, or HoLYoKn,iraessacnusnrrs, sassrsivon :rowonrnmeron :euurr AND MACHINERYCORPORATION, LA CORPORATION 033 VIRGINIA.

MULTIPLE PISTON on BUCKET PUMP.

antenna,

trecific t qn l r l t PatentedvDte-c. 11,1917.

Aplilieation file'd December 27,1916. Serial No. 1391,1188.

the it known that "I, BERNARD .U, lforrrrnn, a citizen 01 the UnitedStates, residing at l-lolyoke, county of Hampden, and State :et'Massachusetts, have invented icertaln new and useful improvements inMultiple lPiston or Bucket Pumps, fully (1650111386.

and represented in the following specification andthe accompanyingdrawings, forming a part oi the same. a i

This invention relates to that class of pumps used especially tor deepwell pumping in which a plurality of reciprocating buckets orplungersact on theliquid suc' cessively, and each bucket rod passes through thebucket rods of the buckets above it, In these constructions differentialplunger actions have been set up due to the fact that each bucket rod isincreased in size in order to contain the bucket rods of the bucketsbelow it, and thereby each bucket above the bottom bucket has beendecreased in capacity to such an extent that they have necessarilydischarged unequal quantities of the fluid pumped. The object of thepresent invention is to overcome this dilierential plunger action and toprovide an improved power pump of this class in which the discharget'rorn each bucket shall be the same without diminishing the totalvolume handled by the pump,

lln the accompanying drawings forming a part of this specification, atriple acting deep well pump embodying the invention in its preferredform is shown, and this construction will now be described in detail andthe features forming the invention then specilically pointed out in theclaims.

lln the drawings:-

15 igure 1 is a front view of the pump with the pump head in elevationand the pump well in section,

Fig. 2 is a diagrammatic view showing the arrangement of the crank headpins in respect to the center line of the crank shaft.

Referring to the drawings the frame 10 oi the pump head is mounted abovethe well 11, and carries the crank shaft 12, shown as driven by gear 13from power shaft ll and pinion 15. The crank shaft 12 carries threeseparate cranks for operating the buckets, these cranks being set 120degrees apart, and connected to the respective buckets as follower-Themiddle crank 16 :isiconnectedibyzits zcrank rod 17 landsliding crosshead.18directly: .to .bncketrrod .19 noonnected ito nbottom e1- :outer:sbucket 0. Out LLSlClBiJllB crank16rare-"the,cranksEl, 21.1mm i :28,28pconnected .vto gistheir crank rods 29,, 29 tand a slidingrcrossheads.30, $301M) rods 31, :31

and yoke 32 to which is attached the tubular bucket rod 33 which carriesthe top or inner bucket The *rod133,with the inclose'd concentric rods26 and 19, moves through the discharge head 35 at the top of the droptube 36 within the well, a suitable stufling box 37 being provided andthe discharge head 35 having a delivery pipe 38. The pump as thus fardescribed is that of United States Letters Patent No. 1,102,583, datedJuly 7, 191 1, but it will be understood that this pump is shown onlyfor illustration, and that the present invention is applicable also tomultiple piston or bucket pumps of other types.

The present invention relates to the increasing or decreasing of thebucket strokes to thereby increase or decrease the dis charge of eachindividual bucket, so that all the buckets shall carry and discharge anequal quantity of fluid. This is done by varying the stroke so as tocompensate for the space occupied by the bucket rods for the differentbuckets.

In the pump illustrated this is aceonn plished by making the cranks ofsuch length as to give the several working rods and buckets differentlengths of strokes.

Referring to Fig, 2, which is a diagrame matic view 01 the location ofthe crank pins with regard to the center 12 of the crank shaft, thecrank pins 21 of the intermediate bucket are so placed with regard tothe crank shaft center as to give the required nominal length stroke.Because of the in creased size of the largest bucket rod 33,

the length of the bucket stroke of the upper bucket is increased byincreasing the crank length, the crank pins 28' being farther away fromthe crank shaft center and, as the bucket rod 17 of the lower bucket issmaller than the other bucket rods the crank of the lower bucket 20 isshorter, its pin 16' being nearer the crank shaft center, so as to givea shorter stroke, such as to carry and deliver the same amount of fluidas bucket 27. The delivery of the pump is the same, therefore, as inpresent pumps having the same nominal stroke.

The preferable application of the invention to pumps having a larger orsmaller number of buckets is as follows:-In a two bucket pump the strokeof the bottom bucket preferably will be decreased below nominal and theupper bucket increased above the nominal. In a'four-bucket pump, thestroke of the'tvvo lower buckets preferably Will be decreased below andthe stroke of the two upper buckets increased above the nominal.

It will be understood that the invention is not limited to a verticalpump nor to the form. of actuating mechanism shown, but that it isapplicable generally in multiple piston or bucket pumps, as defined bythe claims. 1 I

1,2ea,eee

What I claim is:

1. A. pump having a plurality of buckets 25 or plungers arranged in linewith the bucket rods of the outer buckets passing through the bucketrods of the inner buckets, and means for actuating the inner bucketswith a longer stroke than the outer 30 buckets to compensate for thedecrease in capacity due to the increased size of the bucket rods of theinner buckets.

2. A pump having a plurality of buckets or plungers arranged in linewith the bucket 1 rods of the outer buckets passing through the bucketrods of the inner buckets, and cranks and connections for operating thebuckets, the cranks for the successive buckets being increased in lengthfrom the outer set my hand.

BERNARD U. POTTER.

. (Copies of this patent may be obtained. for five cents each, byaddressing the Gommissioncr of Patents,

. Washington, D. C.

